RDF

See rdf1.

Predefined properties for describing some domain are called semantic vocabularies.

1. Have a look at rdf_dublin for describing documents.
   • create a dublin core file for your favourite book
2. Read about the Friend of a Friend project
   • create your own foaf file as directed on the page Foaf Examples
   • add at least ten friends of yours - give at least information about their e-mail addresses, homepages and age.
   • for start you can use foaf-a-matic to create minimalFoafDocument

• SPARQL tutorial
• Introduction To RDF Query With SPARQL
• Documentation from w3.org

1. Go to the sparql demo page, analyze and run existing examples
2. Run Twinkle (on charon: type twinkle in a terminal) and execute queries on your foaf file to retrieve :
   • friends who have name and e-mail defined
   • friends who have name and e-mail defined and optional homepage
   • friends who have name and e-mail defined and optional homepage, sorted by name descending
   • friends whose name starts with 'K'
   • friends who are older than 18 years old
   • friends whose name starts with 'K' or are older than 18 years old, make search caseinsensitive
   • friends having e-mails on student.agh.edu.pl server
   • name of friends, who have homepage or e-mail on student.agh.edu.pl server

1. Analyze and run example queries from here
2. Ask DbPedia about:
   • Universites in Krakow
   • Polish football players

Z braku lepszego miejsca tutaj studenci wpisują komentarze natury ogólnej do tego lab.